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How to: Lipo in a Mugen starter box?

How to: Lipo in a Mugen starter box?

Old 08-30-2009, 06:24 PM
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Default How to: Lipo in a Mugen starter box?

Just ordered a Mugen box and a 4S Lipo today, how would I go about wiring the pack to the box? I haven't seen it yet but I am guessing it has wiring for 2 packs going thru a adapter to 2 motors? So now I am going to have 1 pack to 2 motors, will I have the + battery lead go to a + on 1 motor and the - on the other and the - battery lead go to the -on 1 motor and the + on the other.
Or am I just over thinking before I get the box and see for myself?
tia Joe
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Old 08-30-2009, 07:16 PM
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You need to wire up both motors to the battery in parallel. That way the voltage stays the same to both motors, and you split the amp draw between them.

The easiest way would be to make a Y-harness with a plug that matches your battery, then have two red, and two black wires come out of it. Those would go to the pos / neg terminals on the motors just like if you were running one battery to each.
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Old 08-30-2009, 08:01 PM
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The box has a wiring harness with two battery
connectors to connect two stick batterys to.
One connector has a red and black wire going
into it and one has two black wires going into
it, one of which is the black wire coming out
of the other battery connector. Connect the
lipo pack to the one with the red and black
connector and install a jumper wire on the
other battery connector, so it bridges the
two black wires together. The box is wired
so the red goes to one motor and the black
goes to the other motor and another wire
bridges the motors together to complete
the circut.
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Old 08-31-2009, 04:26 AM
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Make sure the battery is not too long, if it is much longer than a 7.2V Nicad pack it wont fit in the box
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Old 09-01-2009, 07:15 PM
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Thanks guys, and the pack is shorter than a 7.2
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Old 09-01-2009, 07:24 PM
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big tip here: The box will be lighter and have more power.

Dont get lazy and forget to charge the lipo.
Yes it can make it the weekend but once it drops below the voltage threshold it could go bad.

That would hurt. :mad
I fully charge up and factor 3 quals, 1 main, + 4 practice runs.

If I am running 2 classes: after practice day-recharge, and then after 6 quals -recharge.

Keep an eye on the voltage and will get into a rythem of how much it will hold
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Old 09-01-2009, 07:46 PM
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Thanks willbe, my normal race day is only about 8-10 starts
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Old 09-01-2009, 08:41 PM
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An idea that I did was wire in a charging point on the outside of the box so if I want to charge the battery, I can just plug the charger into it and your giggling. The only extra thing you may need to do is extend the balancing line and install and balancing point on the outside of the box. The battery charging point then can be used to check voltage by simply plugging in a multimeter. If you want to get really tricky, you could get one of the make your own multimeter kits from an electronics store, build it all up with the screen on the outside of the bump box and a momemtry closed circut switch and have it hooked into the battery harness, that way when you want to check the voltage, just push the momentry switch and it will display the voltage only when you push the button down and the benefit of not carrying around a multimeter.
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Old 09-01-2009, 09:29 PM
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Heres mine, S'easy.


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Old 09-01-2009, 10:50 PM
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Thats a nice clean re-wire RB FIVE. A Deans connector
and all of the connections are soldered. Lookin good!
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Old 09-01-2009, 11:58 PM
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Originally Posted by RB FIVE View Post
Heres mine, S'easy.


is that a 25c 4s lipo?
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Old 09-02-2009, 02:35 AM
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RBFive, THANK YOU for the pic!

1 question since my box is still not here,
Is the pos. from the battery going to the pos. on the 1st motor then jump neg. of 1st motor to pos. of 2nd motor.
Then neg of battery goes to neg of 2nd motor right?
Thanks a bunch guys, sorry for all the??? just don't wanna fub something up!
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Old 09-02-2009, 08:01 PM
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Originally Posted by OfnaJoe View Post
RBFive, THANK YOU for the pic!

1 question since my box is still not here,
Is the pos. from the battery going to the pos. on the 1st motor then jump neg. of 1st motor to pos. of 2nd motor.
Then neg of battery goes to neg of 2nd motor right?
Thanks a bunch guys, sorry for all the??? just don't wanna fub something up!
Just copy the existing wiring, it comes pre wired with cheap wire, just eliminate the 2 molex connectors on the neg wire.
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Old 09-02-2009, 08:03 PM
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Originally Posted by xjqkz View Post
is that a 25c 4s lipo?
It's the 15c protek from amainhobbies.com
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Old 09-02-2009, 08:06 PM
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Originally Posted by willbe View Post
big tip here: The box will be lighter and have more power.

Dont get lazy and forget to charge the lipo.
Yes it can make it the weekend but once it drops below the voltage threshold it could go bad.

That would hurt. :mad
I fully charge up and factor 3 quals, 1 main, + 4 practice runs.

If I am running 2 classes: after practice day-recharge, and then after 6 quals -recharge.

Keep an eye on the voltage and will get into a rythem of how much it will hold

yeah, what he said. the thing will turn over a peterbuilt semi still but it will be dead, always check your voltage!!
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